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Precise distance measurement system of UWB module of common crystal oscillator

A precision ranging and crystal oscillator technology, applied in radio wave measurement systems, measuring devices, and re-radiation, etc., can solve the problems of time consumption, time error, ranging effect, etc., so as to reduce system errors and improve system accuracy and precision. boosted effect

Inactive Publication Date: 2018-11-30
四川合众精准科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the current UWB module system usually uses one-to-one corresponding crystal oscillators for control, but because the crystal oscillators vibrate at different frequencies, a small time error will be generated, and this time error will cause a larger distance measurement. Influence, affecting the judgment of the system on the distance, the current single UWB chip will involve functions such as sending and receiving or state switching, and will consume a lot of time when the chip is switching between sending and receiving states, the purpose is to provide a UWB module that shares a crystal oscillator Precision ranging system to solve the above problems

Method used

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  • Precise distance measurement system of UWB module of common crystal oscillator
  • Precise distance measurement system of UWB module of common crystal oscillator

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Experimental program
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Embodiment 1

[0018] Such as figure 1 , 2 As shown, the precision distance measuring system of a UWB module sharing a crystal oscillator in the present invention includes a signal transceiver terminal 1 and a signal transceiver terminal 2, the signal transceiver terminal 1 and the signal transceiver terminal 2 have the same structure, and the signal transceiver terminal 1 is signal The two transceivers send signals, and the two send and receive signals for feedback. Two or more UWB chips are arranged in the signal transceiver one. The time of the UWB chip is unified, and each UWB chip receives or sends a signal independently, and one of the UWB chips at the signal transceiver terminal one sends a signal to the signal transceiver terminal two, and one UWB chip in the signal transceiver terminal two is responsible for receiving the signal. While receiving, send a signal to another UWB chip through the shared crystal oscillator, the UWB chip sends feedback information, and sends the feedback ...

Embodiment 2

[0023] This embodiment optimizes type selection on the basis of Embodiment 1. The MCU control unit is provided with 40 pins, 32 of which are communication pins. According to the different communication protocols used by each UWB chip, the UWB chip occupies The number of pins varies. The 40 pins of the single-chip microcomputer can be roughly divided into 4 categories: power supply, clock, control and I / O pins. The power supply and clock will each occupy 2 pins, and the control circuit reserves 4 pins for control. is the communication pin of the I / O interface. According to the type of communication protocol used by the UWB chip, the number of pins occupied by each UWB chip is 1 or more. That is to say, one MCU control unit can generally be matched with 8 UWB chips at the same time. After the UWB chip exceeds the occupied communication pins, more MCU control units need to be added for matching.

[0024] On the specific MCU control unit pin connection, among them the power suppl...

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Abstract

The invention discloses a precise distance measurement system of a UWB module of a common crystal oscillator. The system comprises one common crystal oscillator connected with an MCU, in the MCU, a CPU is connected with a memorizer, a timer / counter, an I / O interface and a clock circuit through a system bus, and a ROM and a RAM are arranged in the memorizer; the system is characterized by further comprising different programs written by the ROM in the MCU in advance, data output to several UWB chips by the MCU through the I / O interface are different; an active crystal oscillator is used as thecommon crystal oscillator, and the MCU performs synchronization control for the UWB chips through vibration frequency of the active crystal oscillator. An arithmetic unit, a controller and a registerare core components at the inside of the MCU, the MCU is composed of two major parts including an arithmetic part and a control part, the arithmetic part can complete arithmetical logical calculationof data, bit variable processing and data transmission operations, and the control part coordinates work according to a certain time sequence and is a part for analyzing and executing instructions.

Description

technical field [0001] The invention relates to a crystal oscillator module system, in particular to a precision ranging system for a UWB module sharing a crystal oscillator. Background technique [0002] UWB (UltraWideBand, ultra-wideband) technology is a new communication technology that is very different from traditional communication technology. It does not need to use the carrier in the traditional communication system. The extremely narrow pulse is used to transmit data, thus having a bandwidth of GHz order. Compared with the traditional narrowband system, the ultra-wideband system has many advantages such as strong penetration, low power consumption, good anti-multipath effect, high security, low system complexity, and can provide precise positioning accuracy, so it is very suitable for Positioning and ranging of stationary or moving objects and people in indoor environment. However, as a short-distance wireless communication method, UWB technology has a short signa...

Claims

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Application Information

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IPC IPC(8): G01S11/02
CPCG01S11/02
Inventor 陈耀洲陈静万世平
Owner 四川合众精准科技有限公司